The customer may have the request to save the video record backup.
Note: This function need more than two hard disks and the redundancy must be used in group mode.
How to configure the group function in NVR:
1. Enter Storage interface and select Storage Mode in the drop-down list on the top-left side.
2. Select Group mode in the right.
3. Click the channel which need to be record in redundancy and Apply.
4. Wait for the system rebooting.